Collins' testing showed Ruiz is still experiencing some symptoms from the concussion he suffered June 18 when a broken bat struck him in the head.
"He's progressing very well, but there are some things that are still concerning on his test," Phillies head athletic trainer Scott Sheridan said. "So while we're here, we're going to do some things with him. We'll do some exercises and things to challenge Chooch."
Sheridan said the team would play it cautious with Ruiz, who had one previous concussion while in the minors.
"Our goal here is to put him back when he's ready," Sheridan said. "Worst-case scenario is you take a player that has a concussion and he comes back too early. It's not like he's a position player. You know it just as well as I do - the first day he goes behind the plate, the first pitch is going to be a foul ball right off the mask."
Other injury updates
Sheridan provided updates on the four Phillies pitchers on the disabled list:
Righthander Ryan Madson (broken right toe) will pitch for double-A Reading in his third rehab outing Friday. Madson will throw 30 pitches to extend his arm. He could be activated before the all-star break. "If all moves right," Sheridan said, "yes, we'd like that to happen."
Lefthander J.A. Happ threw a bullpen session Thursday in Pittsburgh without pain. He will pitch for triple-A Lehigh Valley in Pawtucket on Sunday, his sixth rehab start. "He's not reporting any problems," Sheridan said. "It's a matter of him feeling comfortable on the mound with his pitch ability as opposed to other things."
Chad Durbin (strained right hamstring) is rehabbing in Florida. Sheridan said Durbin was running at 70 percent. He will begin throwing in rehab games in the next week. Durbin could return before the all-star break, but he'll likely come back after the break, when the Phillies are in Chicago.
